Question

A used book store also started selling CDs and videos.In the first week, the store sold a combination of 40 CDs and videos. They charged $4 per CD and $6 per video and the total sales were $180. Determine the total number of CDs and videos sold.

Answer 1

1. To answer this question you will set up an equation in terms of v(videos) only.

2. Then you will create an equation using just the variable v. Solve for v. This will be the number of videos.

3. Use the number videos to find the number of CDs.

4. Check your answer by multiplying the number of CDs by $4 and the number of videos by $6.

Please see the attached pic for all the work.